The Princeton Server Group makes some pretty varied products and services--Video On Demand for educational systems, HD broadcast servers for PBS stations and, last but certainly not least, DV broadcast servers for PEG (public, educational and governmental) stations. CCTV isn't actually a PEG--we provide three channels of public programming, and the educational and governmental aspects are covered by other local stations. But anyway, we receive a small amount of programming from producers with access to PSG servers. These people send programs to their servers using FTP, and there the files sit to be downloaded and played back. It beats bicycling a tape from Princeton to Cambridge! The term "bicycling" doesn't necessarily mean two-wheeled transport; it just means sending a tape in a traditional manner such as mail, messenger, foot or car.
This is their site: http://www.princetonservergroup.com
Here's an interesting and very detailed article about the history and development of PSG: http://www.manifest-tech.com/media_pc/psg_video.htm
Here's a PBS station in New Jersey that has their servers: http://www.njn.net
This website has lectures from Princeton University and has recently started vodcasting. They upload files to a PSG servers, and also accept media this way: http://uc.princeton.edu/main/
Some of the stations in this consortium use their servers: http://jagonline.org/